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S&S Cycle Mk45 Slip-Ons Instruction Sheet

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Instruction 510-0819
05.02.2023
Version 1
© 2021
by S&S® Cycle, Inc.
All rights reserved.
Printed in the U.S.A.
S&S® Cycle, Inc.
14025 Cty Hwy G
Viola, Wisconsin 54664
Phone: 608-627-1497
Technical Service Email: sst[email protected]om
Website: www.sscycle.com
Installation Instructions: S&S® Mk45 4½” Slip-On Muers for
Harley-Davidson® M8 Touring Models
IMPORTANT NOTICE:
Statements in this instruction sheet preceded by the following words are of
special signicance.
WARNING
Means there is the possibility of injury to yourself or others.
CAUTION
Means there is the possibility of damage to the part or motorcycle.
NOTE
Other information of particular importance has been placed in italic type.
S&S recommends you take special notice of these items.
WARRANTY:
All S&S parts are guaranteed to the original purchaser to be free of
manufacturing defects in materials and workmanship for a period of twelve
(12) months from the date of purchase. Merchandise that fails to conform to
these conditions will be repaired or replaced at S&S’s option if the parts are
returned to us by the purchaser within the 12 month warranty period or within
10 days thereafter.
In the event warranty service is required, the original purchaser must call or
write S&S immediately with the problem. Some problems can be rectied by a
telephone call and need no further course of action.
A part that is suspect of being defective must not be replaced by a Dealer
without prior authorization from S&S. If it is deemed necessary for S&S to
make an evaluation to determine whether the part was defective, a return
authorization number must be obtained from S&S. The parts must be packaged
properly so as to not cause further damage and be returned prepaid to S&S
with a copy of the original invoice of purchase and a detailed letter outlining
the nature of the problem, how the part was used and the circumstances at
the time of failure. If after an evaluation has been made by S&S and the part
was found to be defective, repair, replacement or refund will be granted.
ADDITIONAL WARRANTY PROVISIONS:
(1) S&S shall have no obligation in the event an S&S part is modied by any
other person or organization.
(2) S&S shall have no obligation if an S&S part becomes defective in whole or
in part as a result of improper installation, improper maintenance, improper
use, abnormal operation, or any other misuse or mistreatment of the S&S part.
(3) S&S shall not be liable for any consequential or incidental damages
resulting from the failure of an S&S part, the breach of any warranties, the
failure to deliver, delay in delivery, delivery in non-conforming condition, or
for any other breach of contract or duty between S&S and a customer.
SAFE INSTALLATION AND OPERATION RULES:
Before installing your new S&S part it is your responsibility to read and follow
the installation and maintenance procedures in these instructions and
follow the basic rules below for your personal safety.
• Gasoline is extremely ammable and explosive under certain conditions
and toxic when breathed. Do not smoke. Perform installation in a well
ventilated area away from open ames or sparks.
• If motorcycle has been running, wait until engine and exhaust pipes
have cooled down to avoid getting burned before performing any
installation steps.
• Before performing any installation steps disconnect battery to eliminate
potential sparks and inadvertent engagement of starter while working
on electrical components.
• Read instructions thoroughly and carefully so all procedures are
completely understood before performing any installation steps.
Contact S&S with any questions you may have if any steps are unclear or
any abnormalities occur during installation or operation of motorcycle
with a S&S part on it.
• Consult an appropriate service manual for your motorcycle for correct
disassembly and reassembly procedures for any parts that need to be
removed to facilitate installation.
• Use good judgment when performing installation and operating
motorcycle. Good judgment begins with a clear head. Don’t let
alcohol, drugs or fatigue impair your judgment. Start installation when
you are fresh.
• Be sure all federal, state and local laws are obeyed with the installation.
• For optimum performance and safety and to minimize potential
damage to carb or other components, use all mounting hardware that is
provided and follow all installation instructions.
• Motorcycle exhaust fumes are toxic and poisonous and must not be
breathed. Run motorcycle in a well ventilated area where fumes can
dissipate.
DISCLAIMER:
Qualied manufacturer declared U.S. 50-State legal
emissions replacement part on all 2017–later FL touring
models
2
Installation Steps
1. Tools Required:
• ½” and ⁄” Combination Wrench
• ⁄” Drive Ratchet with 4” Extension
• ½” Standard Socket
• ⁄” Deep Well Socket
• 6mm allen wrench or allen socket
2. Removal of Stock Muers:
a. Remove the saddlebags and set aside
b. Loosen the muer clamps on the front of each muer.
c. Remove and discard the ⁄” bolts that secure the muers to
the saddle bag supports. New fasteners are included in the
hardware kit.
d. Remove the stock muers. The application of penetrating oil on
the muer/head pipe joint and a slight rocking motion will allow
for easier muer removal. Remove and discard the stock muer
clamps.
3. S&S Muer Installation:
a. Identify the right and left muers. Right muer has a larger inlet
then the left muer. In addition, MK45 muers have axle nut
clearance dimples in both muers. When the muer is installed,
the clearance dimple always goes to the inside, toward the axle.
b. Install the clamps onto the muers with the head of the bolt on
the inside of the muer and facing down.
c. Slide each muer onto the correct header pipe. If there are burrs
on the pipe, removing them with a le or emery cloth will make
muer installation easier.
d. Attach rear muer hanger tabs to muers with ⁄” bolts and
washers from the hardware kit, and tighten to 18 ft-lb.
e. Make sure the muers are aligned vertically and that the ends
are even. Tighten the muer clamps to 15-18 ft-lb.
f. Thoroughly clean the muers and exhaust system before
starting the motorcycle. Any oil residue or nger prints on the
chrome will cause permanent stains once the system heats up.
g. Re-install the saddle bags.
h. After the rst test ride and after the bike has cooled down, re-
check torque of the muer clamps.
HELPFUL HINTS TO MAINTAIN FINISH OF EXHAUST PIPES AND
MUFFLERS
• Make sure ignition timing is set correctly. Air lters must be serviced
at regular intervals.
• Intake air leaks can cause engine to run lean and overheat, and thus
discolor pipes.
• Make sure there are no exhaust leaks at the junction of the cylinder
head and the exhaust pipe.
• Use fans to ensure that the exhaust system is not over heated when
Dyno tuning.
• Avoid long periods of idling.
• Avoid the use of pressure washers, harsh chemicals or abrasive
cleaners. If water gets into muer during washing, remove moisture
to prevent corrosion. Start engine to warm up exhaust system.
Replacement Parts For S&S Mk45 4½” Muers
1. Right 4.5” Muer assembly for 2017–later models
Chrome ..................................................................................................... 551-1354
Black ............................................................................................................551-1353
2. Left 4.5” Muer assembly for 2017–later models
Chrome ..................................................................................................... 551-1356
Black ............................................................................................................551-1355
3. dB reducer .....................................................................................................551-1274
4. End Cap
Black Thruster ..........................................................................................551-1337
Chrome Thruster ................................................................................... 551-1338
Black Highlight Machine Tracer .......................................................551-1645
Chrome Tracer ........................................................................................551-1646
Black Cutlass ........................................................................................... 551-1339
5. Screw, SHC, High Temp Lock Patch,
10-32 x 3/4”, Stainless Steel .................................................................500-0569
Not Shown
Hardware kit, muer clamps and screws 2017–later models
Left.............................................................................................................. 551-1443
Right ...........................................................................................................551-1444
Bae
Left.............................................................................................................. 551-1345
Right ........................................................................................................... 551-1346
Insulation .......................................................................................................... 551-0003
Bae Retaining Screw ..................................................................................500-0441
5
5
4
3
2
1
Note: Remove the foam insert securing the DB reducer before installation.
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